Pump



March 30 1926.

. A. SCHROEDER PUMP Filed July 29, 1922 2 Sheets-Sheet 2 ,IIIIIII'IIIII""IIII'IIII",

Patented Mar. 30, 1926.

UNITED .STAQTESYPATENT' OFFICE.

ANTHONY scnnonnnn, 0F CLEVELAND, .OHIO, ASSIGNOR on ON -HALF ro JAME MERLE FINNEY, or CLEVELAND, OHIO. i i

imur. I

' Applieationfiled iluly 29', 1922. I semi No. 578,314.

' To all wlzom it vim-y concern." I e 7 Be it known that I ANTHQNY Scrinonnizn, a citizen ofthe United States, residing at Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in and Relating to Pumps, of which the following is a specifiecation.

This invention relates to a pump preferably of the reciprocating piston type. One object of theinvention is to provide an improved pump of relatively simple coir stru'ctioin whereby it may be economically made and readily operated.

Another object of the invention'is to provide a reciprocating pistontype of pump in which the inlet port and outlet portfor the material are controlled by a member interposed between the pump cylinder'and pis ton, whereby the latter may actuate'such member to open one port and close the other at the proper time as the piston moves in either direction.

A further object of theinvention is to, provide an improved construction of recip rocating pump'in which the cylinder comprises a pair of inner'and outer members,

the inner member being'movable relative, to the outer member, whereby the engagement of the piston therewith may be utilizedto control the inlet and outlet ports for the;v

material.

Other objects of the invention will be a parent to those skilled in the art to which my invention. relates from the following description taken in connection with the 210-. companying drawings: 7

Referring to the drawings, Fig. 1 is a sectional View ofthe pump embodying my invention showing the piston at or near the end of its suction stroke.

Fig. 2 isa View similar to Fig. l, but showing the piston at the end of'its force stroke.

Fig. dis a section on the line 33' of Fig. 2. I K

Fig. 4 is a. section on the line4;4 of Fig.3. v i Fig. 5 is a section on the line 5-5 of.

Fig.3.

Fig. 6 is asection'alview of a pump-em bodying my invention, showing its adapta tion to a container; portions of the pum elements being slightly modified. for suc j adaptation". Z A

. charge port 13.

Figsg'T, 8, 9 andlO are sections on the line 7 7+7, 88, 9 9 .andlO- IO,respectively, of; V

connected to one end of thecylinder. and a casing member atattached at its other end.

The cap 3 is formed with a central opening ifor a piston'rod 5. The pistonrod 5 may be operated by any "suitable means,- that shown comprising a handle 6 connected 'to the free end of the. rod ina Well knownmanner. The opening? s provided with screw" threads to .receive and "support a sleeve 7. The sleeve Tmay be rotated in the opening 3 to adjust itendwise'therein for a purpose to be latter S6l3" f01l3l1. The outer end of the sleeve 7 is -fashioned to receive a body portion 8 .in'aXial al-ignment with a L'suitable toolwhereby it may be readily turned. Eight indicatesthe piston which is fixed tothe rod 5 inthe manner to be latter described. The casing" member Aecompri'ses the cylinder 1. and receiving and discharging nippels 9, 10, respectively; whereby a sup- 5 1' ply conduit orp'ipei'nay be connected to the former'and a discharge 'pipe connectejdto 85 the-latteififi At. 11, the casing member -is shaped to forma'seat; for thea'djacent' end (if-the cylinder 1.. Twelvefindicates aport formed in the wall of the body portion '8 for the intake of material from the nipple 9 vthereinto,v such" port being preferably elongated circumferentially of the body, por

tion toadmit the material. freely.- Between the..-inlet port 12 andthe other end of-the pump cylinder 1, the body'portion 8 is formed with a discharge port 13 communicating with the discharge nipple" 10. By. preference, the body portion 8 is shaped or fashioned to provide'laround its interior wall an annular chamber 14C,.'Wliich merges with or is. connected at one --side-with 'the"dis-- 15 indicates a member movably mounted within the cylinder l and controlled by the piston 8"to open-one of the ports 12 and j 13fand! close the other, when ,thejpiston 8 noves -in either direction. .The member 15 preferably comprises a cylinder looselyfita ting the cylinder 1 so that it mayinove end wise thereof in air-axialflireetion. {The I length o. the; 2 cylinder 15 s." substantially 1.1.9

equal to the distance from that wall 16 of the casing member a which closes the adjacent end of the pump to the cap 3 less the distance the ports l 'and'13 are spaced from each other for reasons which will later ap pear. By this arrangei'i'ient, the wall 16 and cap 3 may act as stops to limit the move= mentof the cylinder in either direction. 17 indicates an opening formed in the wall of the cylinder 15 and soaranged that it will register with the port 13 when the cylinder is positioned with that end thereof that is adjacent to the port 12 against the stop 16. lVhil-e only one opening .17 is shown, it is obvious that as many openingsas desired may be termed in the cylinder 15 "for registry with the port 13 or the chamber let to permit the discharge of the material. As shown in the drawings, the piston 8 reciprocate-s inthe cylinder 15 and through its friet'ional engagement with the cylinder 15 moves it endwise or axially, whereby the cylinder may control the ports 12 and 13 to prevent discharge of the material through the inlet port during the "force stroke of the piston or suolzing in oil the material through the discharge port 18 during the suction stroke oi the piston; for example, starting with the piston 8 in the position shown in Fig. 2, where it is at the end of its force stroke and ready to move in, the opposite direction: as the piston 8 moves upwardly, it first moves the cylinder 15 axially into the position shown in Fig. 1, this operation moving (1) the opening 1'? out of registrywith the port 13 and chamber 14 and (2). the open end of the cylinder 15 beyond the inlet port 12. As the piston continues to move upwardly, it sucks in charge of material through the nipple 9. and port '12, filling the cylinder 15. T he piston may be operated a full stroke or less than a full stroke, as desired; In its reverse movement, the piston I 8 hrst moves the cylinder 15 endwise or the p ston rod 5, oneor more tieax y in the opposite direction that is, dov vardly as shown in the drawings-this eperationserving to move the cylinder 15 to the position shown in Fig. 2, thereby closing the port 12 and moving the opening 17 into registry with the port 13 or chamber 1%, that the piston 7 continues to more downward H V j will be forced out 1 the opening chamber Lit, port 7 i ole 10. In. order to insureproper and nnirorm coaetion between the cylinder 15 and walls of he ports12 and 13, as weilas to avoid of the material, the body portion 8- of the casin'"; member is prefer of asizetotit'the cylinder 15 relatiyely lv; If desired, the body portion 8' le d with oil containing grooves l 1 ,7 piston 8 prefer-ably ccinprisesr a disk havingscrew threaded conne bersQO having flanged portions 20 wine engage the cylinder andadevice 21 which has screw threaded connection with the piston rod 5 and may be screwed up thereon to clamp the flezrible members against the disk 19. The securing device 21 is preferably provided with a projecting member 522 arranged to engage the end wall or stop 10 of the casing member 4 to stop the movement of the piston 8 at a point adjacent to the port 13.

23 indicates a spring which is preferably providedto act against the flanged portion of one of the flexible members 20 of the piston 8 to increase the friction between it and the cylinder The spring preterably extends circun'li ercntially around the inner side of the flanged portion 20 and serves to press the flanged portion outwardly; 1n the construction illustrated, the spring comprises a coiled spring, a groove 23 being provided in the circumferential edge of the disk 19 to receive it. In. Fig. ,6, I have illustrated my pump construction as adapted for use in a container A. In this construction the casing member 4 is shaped to provide feet 24twhich may be secured to the bottom of the container by screws 25. As the pump is immersed in the material placed in the container, the walls of the casing member may be provided with a plurality of inlet openings or ports 26 and the discharge nipple 10- is extended upwardly for connection with a pipe 26 which extends to apeint near the open end of the container, where it may extend laterally through the side wall ofthecontainer. The container i-r may he formed in any suitable manner. ll hen provided witha top, indicated at man opening 2? is formed therein to-permit the piston rod that is coi'inected' to the handle- 6 to extend through the top for operation.

It will be noted that the elements of my pump construction are relatively few in number and easily manufactured and assembled. ll hile the cylinder 15 is arranged to move axially, it may be rotated without affecting its operation, or the control of the ports 12 and 13, since the iehamber 1-it extends circumferentially of the casing member and is adapted to receive material from the opening 17- in any position angularly of the cylinder 1 in which the cylinder 15 may be assembled or be moved to: by reason ofthe twisting of the handle 6 ac cidentally or otherwise. The construction of pump is adyantageous in that it elimin ates the necessity of providing valves in the pump cylinder or the endwalls therefor or in the piston. It will also be neted'tha t, in my construction (if-pump there is out one movable element in addition to the piston.

.The pui'n-pis adaptedv for pumping va greases and lubricants containing re atii ely thick and heavy ingredients. I have found by experience that my pump construction is advantageously adapted for pumpingmeasured quantities of materials. 'In the manufacture of the pump, I'provide a cylinder 1 which is slightly larger in capacity than the quantity of material which it is desired to discharge at each force stroke of thepiston;

and also means which control thedistance. of travel of the piston in ts suctlon-stroke so that it will suck in a" predetermined quantity of. material.

end of which is disposed'in the path of movement of the-piston so as to be engaged to be in any sense limiting.

, What I claim 1s:

paratus of the class described, many valterations inc'onstruction and widely d fl'er ing embodiments and applications of my invention will suggest themselves, without departing tromthe spiritandjscopethereof My disclosures and the description here n aiepur'ely illustrative and;are not intended 1. In apparatusadapted measured quantities of greases and like semifluid substances, the combination of a. pump I cylinder having an inlet port and anoutlet port-near one end, the inlet port being disposed between the 'outlet 'p'ort and the end of the pump cylinder that is adjacent to the said ports, a freely movable inner cylinder within the pumpcylinderthat is open at the end which is adjacentto the said ports and is forined with a port arranged to register with the outlet port in the piunp cylinder .when the inner cylinder is moved in one direction and closes the inlet port, and is out otregister with the outlet port when the cylinder is moved in the other direction and the inlet port is uncovered, and a piston movable within the said inner cylinder and operating to move it whenthe pis ton is operated. i

' 2. In apparatus of the class. described, the combination of an outer cylinder, an inner cylinder arrangedwithin and movable end wise of said outer cylinder, and a piston en gaging said inner cylinder and serving to.

move it endwise of said outer cylinder when moving in either direction, saidouter cylinder being formed near one-end with The control means for limitingthe travel of the piston consists of the sleeve 7, already described, the inner for delivering an inlet and an outlet spaced apart in'the direction of the length "of the cylinder, and said inner cylinderbeing open at that end adjacentfthe inlet in the outercylinder, and arranged-to alternately openfand close the inlet of the outer, cylinder as it is moved on: wise, and the inner'cylinder being formed with an outlet disposed to register with theroutlet in said outer cylinder when the piston is moved. in one direction. i

8; In I apparatus oitfthe class. described,

the combination of azst ationarypump 'cylinQ der to one end oflwhich is secured a casing" in which isformed an inlet located near the end of the casing and an outletlocated nearer the cylinder than the inlet, an inner cylinder movable'within said pump cylinder, said inner cylinder being open at that-end adjacent to the casing closing thelend of the outer cylinder and extending into and fitting within the said casing, the inner: cylinder being formedwith an outlet arranged to register with the outlet in 'saidfcasiiig when 7 said inner cylinder is-inoved in one direction relative thereto, and ap ston frictiona'lly engaging. said, inner-wcylinder to .move it? p Y when the'p ston is' operated, whereby the i inlet and outlet 'in the casing'at the end of r the pump cylinder, are controlled;

the combination or. a pump cylinder-having pump cylinder, said inner cylinder being anrinlet andYan outlet near one. en'd,. said I lIIlGt bGlDgfCllSPOSECllBGtWQQH One end of said pump cylinder and the outlet formed 'tl ere-;.'

in, an inner cylinderj movable within said .9

open at that end adjacent tothe inlet in said pump cylinder and formed with an outlet arranged to register withthe outletin said I pump cylinder when said inner cylinderis moved in one direction relative thereto, a 1

piston frictionally engaging said inner cylinder to move it whenthe piston isoperated, whereby the inlet andoutlet of saidpump cylinder are controlled and means for adjustingthe stroke of the piston.

5. In apparatus of the class within andengaging the inner cylinder to move it relative tofsaid outer cylinder, said outer cylinder being formed with an inlet and an outlet and said inner cylinder being formed with an'outlet adapted to register with the outlet in said outer cylinder when the piston is moved in one direction and disposed out of registry therewith when the piston is moved in the opposite. direction, means forlimiting the movement of the in ner cylinder in either direction, and adjust I I described, I the comblnationof inner and outer relatively movable cylinders,,api'ston arranged thereizo f able meansfor limiting the movement of the 1 piston in either direction. g 6. In apparatusof the class. descr bed, the combinationof inner and outer relatively movablef cylinders, and, a 7 piston arranged i. In apparatus o f'the class describedju therewithin and engaging the inner cylinder toinove 1t lGlSIlVG to said outer cylinder,

, said outer cylinder having at one end a casmg formed with an inlet and an outlet and. an annular chamber connectedtosaid outlet,

and one end of said inner cylinder extending into the said. casing and being formed with an outlet adapted to register with said annular chamber when the piston is moved in one direction to a predetermined position and disposed out of registry therewith when the piston isinoved in the opposite direc- 'tion and. the end of the inner cylinder being: arranged to alternately cover and uncover theinlet as the inner cylinder is moved by the piston.

7. In a pump construction, the combina tion of a cylinder having heads at its opposite ends, said cylinder being formed. with an inlet opening adjacent one head and an outlet: opening intermediate itsv ends, a cylindrical valve member arranged within and being of lesslength than said cylinder and movable endwise therein to permlt engagement of one ,end of said member with'the head adjacent to the said openings, whereby it co-acts therewith to close said inlet opening, and disengagement from said head to uncover said: inletopenlng, said-valve member being formed with a single opening adapted to register with said outlet opening when said ineniberis, 1n the first ,rnentioned position, and a piston frictional'ly engaging said valve IIlGHIbQI'ytO actuate, it

and movable relative thereto to efiiectpumpmgactioninto and out of said cylinder.

8, In a pump construction, the combination of a cylinder having;v heads at its opposite ends, said cylinder being formed with an inlet; opening adjacentone head and; an outlet opening intermediate its ends, a cylindrical valve member arranged within and beingof less length than said cylinder and movable endwise therein to permit engagement-of one end of said member with the adyacent: head, whereby ,1t co-acts therewith to close Said inlet opening, and disengagement from said head to uncover said inlet opening, said valve member being formed with a single opening adapted to register with said outlet opening when said member is in the first mentioned position, a piston frictionally engaging said valve member to actuate it and; movable relative thereto to eiieet pumping action: into and out of said ANTHONY sonnonnnn. 

